Pump, engine, and the like



Nov. 10,1925. y 1,560,624

` C. H. VARLEY PUMP,A ENGINE, AND THB LIKE Filed N dv. 6. 1923 2Shasta-Shut 1 Nov. 10 `l1925. 1,560,624

C. H. VARLEY PUK?, ENGINE, AND THB LIKE Filed Nov. 6. 1923 2 Shoots-Shutz Patented Nov. l0, 1925-.

UNITED sTATEs APikrl21v1* OFFICE.

cnoxwmnaxronn vanua?, or cnrnwonrn mi.. ma animaron, meenam).

run?, wenn, AND m Application nled AIoveinher 6, `1033. Serial No.$73,071.

To all whomtmayconoem:

Be it known that I CROMWEIL HAMFOBD Valmer,v a subject of the King ofGreat Britain, residing at Ghilworth Hill, near Guildford, in t e county.of Surre Eng-v land, have invented certain new an useful Improvementsin or :Relatin to Pumps, Enthe following gines, and the like, of whic isa specification.

This invention relates to pumps, englnes and the like of' the kinddescribed in my prior United States Patent No. 1,378,065..

driven so that all points of -the -displacer move in circles of similardiameter, said movement being hereinafter vtermed a par acyclicmovement.

In pumps and englnes ofthe aforesaid type as described in my`Unit'edfStates Patent No. 1,378,065 the displacer was provided with flangeswhich extended beyond and worked u on Han ed portions provided on theside p ates of t in addition, to a driving shaft, separate guidingeccentrics'or their equivalent were also provided. v

According to one feature of the present invention, the' aforesaid angesare dispensed with, and the displacer is enclosed by, and works upon,the body portion vor carcase of the pump, engine or the like so that itdoes not extend `beyond the same.

According to another feature of the present invention the use ofseparate guidin eccentrics or their equivalent is dispense with and thedisplacerv is driven and also` guided in its so-called paracyclicmovement through driving plates, gearing, eccentrics, cranks or thelike, which are also preferably7 located mainly or entirely within lthecasing of the apparatus. To these endsithe enclosing casing may beconstituted by a hollow casting provided with a central web which actsas a support for a pair of-driving and guiding eccentrics, disc cranksor theirequivalent, said web also constituting the rear workin faceofthe displacer, the 'front workinor ace being constituted bg a coverplate which is detachably connecte to the casting. A centrallydisposedboss is -wihch the dis'placer works, is

`vided with pac e enclosing casing, while,

also providedl which may formed inte` y I.gral with the'castin sald bossServing as ace for the displacer.

an innerworkin The rearcover p ate may also be yprovided vwithrecessesto accommodate-the rear ends of the shafts of the eccentrics orcranks" which drive and guide the displacer as 'also with -a bearin forthe shaftl vwhich drives, for example t rough spur gearing, the saideccentrics or cranks.

According to a' further feature of the presy; cnt .l-nventlon thedisplacer, or the external casing, as also a fixed inner member around'structed and' arranged as automatically to take upfor wear.

The packing pieces may be` tion or casing or certain vof the packingpieces may be located within the displacer and the remainder in the bodyportion.

' In order that the said invention may be clearly understood and-readilcarried into effect the same will now be4 e'scribedl more drawingwhichjshows by way of example two constructional forms of pumpsembodying the three aforesaid features in combination, and in whichFlgurev I- is an elevation of one form of pump with the. front coverplate removed as' ingpieces which are so cony O ositionedeither xn thedisplacenor. 1n the, ody porfully with reference to the accompanying iFigure l, the displacer being shown in ap`` proximately the positionwhlch it` takes 4up when in its extreme lateral position. .Figure 3 is aview corresponding to Figure 1 showing a pump.

. Figure 4, 5 and 6 are detail views showing modified forms of packingpieces.

modified construction of Y A is the displacer which, in the exampleshown at Figures 1 and 2 is constituted by cas- 1 a gappedcylinder. B isthe enclosing ing which, in the example shown at Figures 1 and 2 is of clindrical formation. B is the central web, (J is the front cover plateand D is the rear cover plate. It will be'observed that the web B', thesides of the' casing B,

and the front cover plate C, completel enclose the displacer A, theseparts thus orming outer working faces for the displacer A.

-An inner working face is provided-by acyi v lindrical vboss'vlE, Ywhich in vthe Aexam le shown, is carried by 4a we serving as a artitionwhich divides the suc- -tion from t e delivery side of the pump.

e, the web e a so The front cover plate C- is secured to the 'central'-web B by a bolt F andnut F, the head F2 of the bolt being formed with are- -cessed portionwhich acts asa support for the front end of thedriving shaft H, H

are the combined guiding and driving vele-v lments which, in ltheexamples shown, are

constituted by disc cranks, the crank in l1.' of each crankextending-into a recess 1n the displacer A, said recess being providedwith'- a liner'a. The disc h2 of each crank rotates within a liner b inthe web B and the rear end of each crank shaft is supported within arecess in the rear cover plate D, said recess being also provided with aliner d.

The driving shaft G rotates within a bearing f] in the rear cover plateD. Keyed to displacer A.

The displaeer A,.asl also the central boss E, is providedwith packingwhich, inthe examples ,shown, is constituted by wedgelike pieces K ofsuitable material inserted in undercutslots lo', k. Positioned beneathVeach wedge-shaped piece K is la spring k2 which tends to thrust thepacking outwards, each spring, in the examples shown, being constitutedby a piece of vresilient steel wire of sinuous formation. Mounted withina recess Z in the front face of the dis lacer A is a-strip of packingmaterial L, t e recess Z being closed at each end by the two fillingpieces Z'. A similar strip of packing material (not shown) is providedand located within a recess in the rear face of the displacer, thissecond packing strip being interrupted at the points where the pinsIrl-of the crank K enter the displacer.

Instead of a pair of cranks, more than two can be employed; `forexample, four cranks may be used, one crank being placed between eachpair of packing pieces K, K. p

In the modified arrangement shown at Figure 3 the displacer is formedwith-bosses A', A', which accommodate the crank pins h', h', the latterbeing of massive construction, and the sides of the casin B are formedwith recesses B2,'B2, to a lapt the same to the modified construction.of displacer. The surfaces a", ax of the casin B, the displacer A, andthe central boss E, have identical curvatures, and, to this end, arestruck from the saine centre, while the surfaces a", a of the bosses A',A', and ofv the4 interior surface of the recesses B', B2 are also ofsimilar curvatura. In this embodlment of the invention the packingpieces K, K are adapted to co-operate with surfaces K', K', constitutedby inserted and replaceable metal strips which are so shaped as to'l'ing to the stroke ofthe cranks; for example, in cases where-the crankshave a throw of 1", and accordingly a stroke of 2, the curved surfacesK', K', would have a radius of 2". In addition to the driving pinions J,J, cranks may be provided at the ends of the shafts H, H and connectedtogether by a tie member or connectin rod not shown), said ycranks beinlocate outsi e'the casing and at right ang es to the cranks h', Il? soas to ensure a smooth passa e over the dead centre. The connecting rolocated between e surfaces K', K', are y .struck from centres havlngradii correspondthel aforesaid additional cranks may, 1n certain cases,serve as thedriving member for the shafts H, H; the inions J, J and Iand the shaft G being dispensed with.

In the modified constructions of packing shown at Figures 4, 5 and 6each piece is formed in two parts m, m situated within an undercutrecess and pressedoutwards by a sinuous piece of spring steel m2. Thepacking piece shown insectinal 'end view at lFigure 4 may be used inplace of the packing L, the part m thereof'being wedgeshaped andpositioned above one of the humps of the spring m2 so that it is pressedupwards and outwards as the packing piece is worn down, therebycompensating auto-y matcally for wear. Figure A5 is a longitudinalsection and Figure 6 is an end view of a packing piece which may replacethe packing pieces K. In this instance the spring m2 acts both to pushthe parts outwards as wear takes place and also to maintain them byendwise ,pressure in close contact with the cover C and web B'. Holesorv slots may be formed in the'side faces ofthe packing strips so as toaccelerate wear on these surfaces, and by thus reducing the thickness ofthe` wedges, to allow them to protrude further out so as to takeyup thewear on the contacting portions.

Packing pieces may also be provided with ends having faces whichmeet atan angle. Balance weights may be used where necessary or in the case ofcranks the arrangement of the tie rod may be so chosen as to effect thenecessary balance. Eccentrics may also be used in place of cranks andvice versa, whilesuitable oiling arrangements maiy be added wheredesired.

n view of the fact that the displacer element A or A hasa parac clicmovement imparted thereto, in contraistinction to an leccentricmovement, it is possible to emy ploy resilientfpacking pieces havingflat rubbing surfaces .which engage on fiat facets on the casing or onthe displacer element A or A', which facets are parallel to the fiatrubbing surfaces ofthe packing pieces, thus producing increasedefficiency. The packing pieces, as also the facets, are preferably madereplaceable. A p

What I claim andv desire to secure by Letl -ters Patent ofthe UnitedStates is Y v placer, a hollow lcasing surrounding said displacer andforming a working face for l I Y the exterior` face thereof, a centralweb on said-casing whichA constitutes a working face Afor the rear sideof said displacer, and a cover vlate detachably' connected to thecaswhich'forms a working lface for the front "of said displacer,

2. An engine or pumpof'the kind set forth comprising a displacer, meansfor, impart'` ing a paracyclic movement to said displacer,`

' V"closed by .and adapted'to be displaced with- Y a casmg'enclosingsaid displaoer and formv detachably connected to the casingl which`forms a-'working face for the front of said ing a working face for theexterior face lof said displacer, a central webon said casing whichAconstitutes a working face vfor the' rear side of said `displacer, acoverfplate displacer, and a central boss which serves as a Iworkingface for the inner rface fofjs'aid ,l

Y 11 I -8. An engine or pump of theklnd set forth l' 1 displacer.

3.`An en "ne or pump offthe kind-.set forth comprising a displacer,means for-im art-.'-

ing a paracyclic movement to said disp acer,

' a casing enclosing said-displacer and form- 1n a working face for theexterior face of i said displacer, a central web von said casing whichconstitutes a working face for the rear side of said displacer, a coverlate which forms aworkin face for the ront vof'said displacer, pac 'ng`pieces between said displacer. and said casing, and means fao forautomatically taking up for wear on engine or pump of the kind set forthcomprising a dis lacer, a casing enclosing said displacer an forming aworking face for the exterior of said displacer, a central web on saidcasing whlch constitutes a work- 'ing face for the rear side of saiddisplacer,

a cover late which forms a working face for thev ront side of thedlsplacer, a central limparted thereto'.

,said cranks bein `said driving sha boss. which serves as a working facefor the interior side of such displacer, packing pieces between saiddisplacer said boss and said casing and means for automatically takingup for wear on said acking pieces.

-' 5. An engine or pump of-t e kind set forth4 comprising a displacer,acasing enclosing said displacer, and combined driving and guiding meanswhich both drive and also guide said displacer in such manner that allpoints of the displacer move in circles of similar diameter relativelyto the casing, whilemaintaining a traveling zone of con- -tact'wiih theenclosing walls thereof.

= 7'. An engine or ump of the kind set forth 'comprising a disp acerelement entirely enin acchamber in such a manner as to maintain-atraveling zone of contact with the walls thereof, a vpair of crankmembers directly attached to said element said crank members beingadapted both to rotate and also to guide the displacer in such mannersimilar dlameter.

comprising a displacer, a casing enclosing said displacer, a lrear coverplate, a central web, crank members disposed between said rear coverplate and said central web and adapted to impart a 'paracycllc movementto said displacer, a driving shaft, spur gearing, arranged on each sideof and being driven through saidspur gearing.v

9. An engine or pump of the kind set forth comprisinr a displacer, meansfor im arting a paracyc ic `movement to saiddisp acer, a casingenclosing said displacer and formin a working face for the outer surfaceof sai displacer, flat facets on said casing and packing pieces havingflat rubbing surfaces that all points thereof move in circles of whichengage said fiat facets on the casing said fiat faces being parallel tothe flat rubbing surfaces of the packing pieces.

